Mitch Kupchak got his most boards in a game against the Knicks on March 25, 1981, with 20 boards.

Interpreted as:

Mitch Kupchak most rebounds in a regular-season game

	NAME	REB	DATE	TM		OPP	MIN	PTS	AST	STL	BLK	FGM	FGA	FG%	3PM	3PA	FTM	FTA	FT%	TS%	OREB	DREB	TOV	PF
1	Mitch Kupchak M. Kupchak	20	3/25/1981	WAS	vs	NYK	34	28	0			10	15	66.7	0		8	13	61.5	67.6	7	13		1
2	Mitch Kupchak M. Kupchak	17	11/20/1981	LAL	vs	SAS	36	25	2	1	1	11	11	100.0	0	0	3	7	42.9	88.8			3	2
3	Mitch Kupchak M. Kupchak	17	1/18/1981	WAS	vs	NJN	38	27	1			9	13	69.2	0		9	13	69.2	72.1				5
4	Mitch Kupchak M. Kupchak	17	11/24/1978	WAS	vs	LAL	36	32	1	0	1	13	21	61.9			6	8	75.0	65.3	8	9	4	4
5	Mitch Kupchak M. Kupchak	17	4/1/1977	WAS	vs	HOU	23	18	2			7	10	70.0			4	6	66.7	71.2				3
6	Mitch Kupchak M. Kupchak	16	3/8/1981	WAS	vs	CHI	34	15	1	2	0	7	16	43.8	0	0	1	2	50.0	44.4	6	10	2	2
7	Mitch Kupchak M. Kupchak	16	3/4/1981	WAS	@	SDC	28	18	1	0	0	5	11	45.5	0	0	8	15	53.3	51.1			1	4
8	Mitch Kupchak M. Kupchak	16	4/4/1979	WAS	vs	BOS	33	19	2			7	11	63.6			5	5	100.0	72.0				2
9	Mitch Kupchak M. Kupchak	16	11/28/1978	WAS	@	NYK	34	20	4			8	15	53.3			4	4	100.0	59.7				3
10	Mitch Kupchak M. Kupchak	15	3/26/1978	WAS	vs	NJN	26	25	0			9	18	50.0			7	9	77.8	56.9				4
11	Mitch Kupchak M. Kupchak	14	1/17/1981	WAS	vs	SAS	36	11	0	1	1	4	15	26.7	0	0	3	4	75.0	32.8				3
12	Mitch Kupchak M. Kupchak	14	4/8/1978	WAS	@	PHI	37	31	3			13	21	61.9			5	9	55.6	62.1				5
13	Mitch Kupchak M. Kupchak	14	3/25/1977	WAS	@	BOS	17	16	1			5	7	71.4			6	9	66.7	73.0				3
14	Mitch Kupchak M. Kupchak	14	1/15/1977	WAS	vs	POR	19	10	1	0	0	4	5	80.0			2	6	33.3	65.4	4	10		3
15	Mitch Kupchak M. Kupchak	13	4/12/1985	LAL	vs	SEA	40	29	3	1	0	13	21	61.9	0	0	3	5	60.0	62.5	4	9	0	5
16	Mitch Kupchak M. Kupchak	13	3/27/1985	LAL	@	SEA	20	14	0	0	3	5	11	45.5	0	0	4	4	100.0	54.9	5	8	0	4
17	Mitch Kupchak M. Kupchak	13	12/4/1981	LAL	@	DEN	27	14	4	1	0	7	13	53.8	0	0	0	2	0.0	50.4	3	10	4	3
18	Mitch Kupchak M. Kupchak	13	1/8/1981	WAS	@	KCK	38	22	4	0	0	9	15	60.0	0		4	4	100.0	65.6				5
19	Mitch Kupchak M. Kupchak	13	11/28/1980	WAS	@	CLE	29	14	0	0	1	2	12	16.7	0	0	10	14	71.4	38.5	6	7	6	3
20	Mitch Kupchak M. Kupchak	13	12/2/1978	WAS	vs	KCK	27	17	0	0		6	11	54.5			5	7	71.4	60.4				4
21	Mitch Kupchak M. Kupchak	13	2/10/1977	WAS	@	PHX	21	22	1	0	0	9	14	64.3			4	8	50.0	62.8	4	9		3
22	Mitch Kupchak M. Kupchak	13	11/9/1976	WAS	@	NYK	13	11	1			4	6	66.7			3	3	100.0	75.1				4
23	Mitch Kupchak M. Kupchak	12	12/6/1981	LAL	vs	KCK	25	18	1	0	0	6	10	60.0	0	0	6	7	85.7	68.8				2
24	Mitch Kupchak M. Kupchak	12	11/13/1981	LAL	vs	POR	37	20	2	0	0	8	13	61.5	0	0	4	5	80.0	65.8	6	6	1	4
25	Mitch Kupchak M. Kupchak	12	1/14/1981	WAS	vs	LAL	35	20	2	2	1	7	14	50.0	0	0	6	9	66.7	55.7	5	7	2	4